Barangay San Antonio

Barangay San Antonio is a mid-sized barangay in the City of Iriga, located in the province of Camarines Sur, in the Bicol Region region of the Philippines.

According to the 2020 Philippine census, Barangay San Antonio had a population of 4,074. This made it the 8th largest of 36 barangays in City of Iriga by population, placing it in the upper half of the city. Residents of Barangay San Antonio accounted for approximately 3.56% of the total population of City of Iriga, which stood at 114,457 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Antonio changed from 4,225 to 4,074, a shift of -3.6% over the five-year period. This places the barangay among those with contracting populations in City of Iriga. Barangay San Antonio is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

City of Iriga is a city comprising 36 barangays, and serves as the governing unit directly responsible for local services in Barangay San Antonio, including public health, sanitation, peace and order, and civil registration. Within the wider province of Camarines Sur, which contains 1,063 barangays across its component cities and municipalities, Barangay San Antonio ranks 88th by 2020 population. Camarines Sur is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay San Antonio is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.